1. A piece of code, not yet written, whose anticipated length is
significantly greater than its complexity. Used to refer to a program that
could obviously be written, but is not worth the trouble. Also used
ironically to imply that a difficult problem can be easily solved because a
program can be written to do it; the irony is that it is very clear that
writing such a program will be a great deal of work. “It's easy to
enhance a FORTRAN compiler to compile COBOL as well; it's just a
SMOP.”

2. Often used ironically by the intended victim when a suggestion
for a program is made which seems easy to the suggester, but is obviously
(to the victim) a lot of work. Compare
minor detail.